I opened the bill, and it read something similar to "Ha you thought this was real didn't you?" I went home and read a few articles online about a new scheme carjackers are using to take vehicles. The person who placed the money on your car is usually in a car right next to yours. Once you step around the front of your car, they jump into the drivers seat and take off.
Luckily, I didn't see this "bill" until I was already driving down the highway, and no one was around when I pulled over. Everyone just be careful and be smart with your actions. Be aware of your surroundings at all times, and if you feel uncomfortable, ask for someone to walk you to your car.
Stay safe out there. I never thought of something like this happening around here, much less to me. I am grateful I did not see the bill initially or my car, with my son inside, could have been taken. Someone was definitely watching over us at that moment.